Improvement in button-hole attachments for sewing-machines



E. S. SPAULDING.

BUTTON HoLE ATTACHMENT EOE SEWING MACHINES.

Patented Aug.8,1876.

lmffwar 137 i gfj m4 N-PETERS. FHOTO-UTHOGMPHER, WASHINGTON, D C.

UNITED STATES PATENT EETCE.

EDWARD S. SPAULDING, OF NEW YORK, N. Y.

IMPROVEMENT IN BUTTON-HOLE ATTACHMENTS FOR SEWING-MACH|NES.

Specication forming part of Letters Patent No. 180,952, dated August 8,1876; application tiled January 11, 1876.

To all whom it may concern:

Beit known that 1, EDWARD S. SPAULDING, of the city of New York, countyof New York, and State of New York, have invented a new and usefulSingle-Thread Stitch Button-Hole- Sewing Attachment, to be worked inconnection with Sewing-Machines; and I do hereby declare the followingto be an exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,making a part of this specification, in which Figure 1 represents a sideelevation of the attachment; Fig. 2, an end view of the same; Fig. 3, arear sectional view of the same, taken 011 the line of Fig. l; Fig. 4, aview of the shuttle. Fig. shows the shape of the plate J, and asoperating on the pinion I of the loopcarrier H. Fig. 6 shows a view ofthe front plate or shuttle-carrier R. Fig. 7 shows the projecting arm b,as the guide for the needle. Fig. 8 shows the shape of the adjustablefoot, with its throat-plate E. Fig. 9 shows the plate R2, foroperatingthe shuttlecarrier. Fig. 10 exhibits the main stationary plateV, with the needle-bar lever Y attached. Fig. 1l is a bottom view of theattachment. Fig. 12 shows the shape of the spring and lever T. Fig. 13represents the lower plate a, to which the forked cam f is attached.

My invention relates to that class of buttonhole attachments wherein ashuttle carrying an eye-pointed needle is employed, and in the operationof which the thread carried by the needle, after having been forcedthrough the cloth or material operated on, is carried over the saidshuttle, forming thereby a stitch similar to the button-hole stitchusually formed by hand; and the invention consists in certain new anduseful combination of parts for operating the shuttle, the presser-foot,and the loop-forming mechanism, all of which will be more fullyhereinafter explained.

A represents the presser-bar of an ordinary sewing-machine. B is theadjustable foot at the lower end of the har, pivoted thereto by aset-screw, C. D is a lever for raising or lowering the said foot, as maybe desired, to clamp or release the cloth or material operated on.

The foot B is provided with a throat-plate, E, cast solid to the sidenext to the needle,

and has an aperture with an open slot, G, at top, to allow the thread tobe drawn up through it by the loop-carrier H.

H is a loop-carrier, attached to a pinion, I, which is operated backwardand forward by the ,teeth on the plate J and the loop-carrier H has ahook, K, on its extremity, that takes hold and carries the loop of thethread over and behind the shuttle L, and casts the thread on theopposite side of the shuttle, the loop being parted for that purpose bythe front and back points M M of the shuttle.

N is an eye-pointed needle, attached to the front end of the shuttle,which is held and released in its forward and backward movement by thereciprocating motion of the circular plate P.

The shuttle-carrier R receives a pendulous movement on its pivot bymeans of its connection with cam-slot S at the' lower end of the carrierR; and the spring and lever T, that slide backward and forward on thecam edge W, at the lower side ot the main stationary plate V, operatethe plate P, that clasps and releases the shuttle.

llhe shuttle L has a circular recess to hold the bobbin, which isconfined therein by the circular plate P; and the end of the thread ofthe bobbin passes through the aperture of the shuttle, and along thegroove in the needle to the eye, where the thread spreads to form theloop. After the needle has perforated the cloth or material operated on,the hook K, at the end of the loop-carrier H, catches in the loop, andcarries the thread back over the rear of the shuttle.

The rack-plate J has a cam-slot, F, diagonally across its center, with acircular rack at the lower end.

Motion is imparted to this plate by the camroller X on the center of theneedle-bar lever Y, acting in said slot. The rack J is pivoted at top tothe main plate V, by which, with the roller X and lip-and-down movementof the lever Y, the rack J receives its pendulum motion. Theshuttle-carrier R, with its cam-plate R2, moves in front of the rack Jon the same pivot at top. The cam-plate R2 is provided with aheart-shaped cam or recess across its center, in which the roller Xoperates, that gives the carrierplate R a separate motion from the rackJ, which is independent of the rack J, and the rack J, engaging in thepinion I, moves the loop-carrier Il backward and forward, and thisindependent motion of the shuttle-carrier R is to produce thehalt-motion of the loopcarrier H. The needlebar lever Y is centered at Zon the main plate V, and moves up and down with the needle-bar of asewing-machine, to which it may be attached b v any suitable cam-roll inthe slot at the end of the lever. The spring-lever T is attached to thelower plate a by a forked cam, j', at one end ot' the plate R, for thepurpose ot' giving the circular plate P its in and out motion to holdand release the shuttle L. The guide b for the needle and inside of thebutton-hole or eyelet-hole to be stitched is a projecting arm fastenedto the main plate V, with the circular aperture as the guide, and theopening at top for the thread to pass up, and corresponds with thethroat-plate E. Below the aperture, in this guide, is the guide-pin d,around which the button-hole or e velethole moves while being stitched,the feed of the sewing-machine moving the work while the pin guides it.

The operator trst raises the adjustable foot B, then places the Workunder the arm b, with its projecting pin d in the center of thebuttonhole to be stitched, then lowers the foot B to its properposition, and adjusts the lever I) to hold it; next, the operator startsthe sewingmachine, and the downward motion of the needle-bar lever Ygives to the shuttle-carrier its pendulum motion-at the same timetightens the shuttle to insure the accuracy of the stitch. The needlethen enters the guide b, and then, through the work, into thethroatplate E. The loop-carrier H then moves forward, aud catches theloop on the opposite side of the throat-plate E; the upward motion ofthe needle-bar then carries it to the rear ot' the shuttle; theshuttle-carrier starts back; then the circular plate moves outward, andreleases the shuttle, when the shuttlecarrier R moves still t'artherback, and draws up the stitch.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. In combination with the plate V, shuttlecarrier It, and rack J, thelever Y and connecting mechanism, as described, whereby a pendulousmovement is imparted to said shuttlc-carrier and rack, as and for thepurposes set forth. a

2. In combination with the shuttle L and plate V, provided with the camsurface W, the. plate P, lever T, provided with the cam f and slidingplate a, for clamping and releasing the shuttle as the same is vibratedtoward and from the material operated on, as set forth.

3. In combination with the rack J, provided with the cam-slot F, andlever Y carrying the rolier Z, the loop-carrier H, and pinion I, wherebythe proper oscillatory movement is imparted to the said loop-carrier, asset forth.

4. The arm-guide b, provided with the aperture and slot in its top, andhaving the guidepin d on its under side, as and for the purposesdescribed.

5. In combination with the presser-bar A, and the adjustable foot B,provided with the throat-plate E and open top aperture G, the lever D,for raising and lowering said foot, as

specified.

E. S. SPAULDING.

Witnesses:

J. FRANKLIN RELGART, CHAs. P. WEBSTER, Jr.

